the president holds a last-minute press conference and calls on the senate to act on the fiscal cliff. but with four days to go, will his push make a difference? >>> plus, politicians promised that the newtown shooting would change our national debate on guns. are those just empty promises? >>> we count down the top five political rivalries. who won, who lost, what it means for 2013. let's go "outfront." >>> breaking news. the president makes an 11th hour announcement tonight putting the pressure squarely on the senate so broker a deal on the fiscal cliff. >> senators reid and mcconnell are working on such an agreement as we speak. but if an agreement isn't reached in time between senator reid and senator mcconnell, then i will urge senator reid to bring to the floor a basic package for an up or down vote, one that protects the middle class from an income tax hike, extends the vital life line of unemployment insurance to 2 million americans looking for a job, and lays the groundwork for future cooperation on more economic growth and deficit reduction. >> and just moments ago, senator